Bird's-View.md

+```plantuml
+@startuml
+namespace arista {
+    class Client << (S,Aquamarine) >> {
+        - transport interfaces.Transport
+
+        + GetConfig() interfaces.ClientConfig
+        + ListPorts() <font color=blue>map</font>[int]interfaces.Port
+        + PushReceiver() error
+
+    }
+}
+
+"interfaces.Client" <|-- "arista.Client"
+
+namespace ciena {
+    class MCPClient << (S,Aquamarine) >> {
+        - transport *client.Runtime
+        - client *client.ServiceTopologyTAPI
+        - database *database.Database
+        - buffer *bytes.Buffer
+        - config *interfaces.ClientConfig
+
+        + GetConfig() interfaces.ClientConfig
+        + ListPorts() <font color=blue>map</font>[int]interfaces.Port
+        + PushReceiver() error
+        + GetConnections() error
+        + GetLinks() error
+        + GetNodes() error
+        + GetNodeEdgePoints() error
+
+    }
+}
+
+"interfaces.Client" <|-- "ciena.MCPClient"
+
+namespace database {
+    class Database << (S,Aquamarine) >> {
+        - driver neo4j.Driver
+
+        + StorePND(pnd *PND) neo4j.Node
+        + RemovePND(id string) 
+        + GetPNDByID(id string) 
+        + GetNodesByLabel(label string) 
+        + GetNodeByID(id string) 
+        + StoreNodes(json string) []neo4j.Node
+        + RemoveNodes(json string) 
+        + RemoveSingleNode(id string) 
+        + StoreLinks(json string) []neo4j.Relationship
+        + StoreNodeEdgePoints(json string) 
+        + StoreConnections(json string) 
+        + Shutdown() error
+
+    }
+    class PND << (S,Aquamarine) >> {
+        - name string
+        - description string
+        - interfaces []string
+
+    }
+}
+
+namespace interfaces {
+    interface Client  {
+        + GetConfig() ClientConfig
+        + ListPorts() <font color=blue>map</font>[int]Port
+        + PushReceiver() error
+
+    }
+    class ClientConfig << (S,Aquamarine) >> {
+        + Identifier string
+        + Endpoint string
+        + Username string
+        + Password string
+
+    }
+    interface Port  {
+    }
+    interface PrincipalNetworkDomain  {
+        + Destroy() error
+        + AddSbi() error
+        + RemoveSbi() error
+
+    }
+    interface SouthboundInterface  {
+        + AddClient() error
+        + RemoveClient() error
+        + CollectHeartbeats() error
+        + ListClients() <font color=blue>map</font>[int]Client
+
+    }
+    interface Transport  {
+        + SetConfig( <font color=blue>interface</font>{}) error
+        + GetConfig() <font color=blue>interface</font>{}
+
+    }
+}
+
+namespace nucleus {
+    class Core << (S,Aquamarine) >> {
+        - clients <font color=blue>map</font>[string]interfaces.Client
+        - database database.Database
+        - config controllerConfig
+
+        + IsRunning <font color=blue>chan</font> bool
+
+        - readControllerConfig(configFileController string) error
+        - readClientConfig(configFileClient string) error
+
+        + Init(socket string, configFileController string, configFileClient string, IsRunningChannel <font color=blue>chan</font> bool) 
+        + AttachDatabase() 
+        + Shutdown() 
+
+    }
+    interface SBIGreeter  {
+        + SBIHello() 
+
+    }
+    class buf << (S,Aquamarine) >> {
+        + Write(p []byte) (int, error)
+
+    }
+    class clientConfigs << (S,Aquamarine) >> {
+        + Client []interfaces.ClientConfig
+
+    }
+    class controllerConfig << (S,Aquamarine) >> {
+        + CliSocket string
+        + DatabaseSocket string
+        + DatabaseUser string
+        + DatabasePassword string
+        + DatabaseCrypto bool
+        + ConfigPath string
+
+    }
+    class logConnection << (S,Aquamarine) >> {
+        - stream proto.GrpcCli_CreateLogStreamServer
+        - id string
+        - active bool
+        - error <font color=blue>chan</font> error
+
+    }
+    class nucleus.buf << (T, #FF7700) >>  {
+    }
+    class pndImplementation << (S,Aquamarine) >> {
+        - name string
+        - sbiContainer []interfaces.SouthboundInterface
+
+        + Destroy() error
+        + AddSbi() error
+        + RemoveSbi() error
+
+    }
+    class server << (S,Aquamarine) >> {
+        - core *Core
+        - logConnections []*logConnection
+
+        + SayHello(ctx "context.Context, in *proto.HelloRequest) (*proto.HelloReply, error)
+        + CreateLogStream(req *emptypb.Empty, stream proto.GrpcCli_CreateLogStreamServer) error
+        + BroadcastLog(log *proto.LogReply) 
+        + Shutdown(ctx "context.Context, in *proto.ShutdownRequest) (*proto.ShutdownReply, error)
+        + TAPIGetEdge(ctx "context.Context, in *proto.TAPIRequest) (*proto.TAPIReply, error)
+        + TAPIGetEdgeNode(ctx "context.Context, in *proto.TAPIRequest) (*proto.TAPIReply, error)
+        + TAPIGetLink(ctx "context.Context, in *proto.TAPIRequest) (*proto.TAPIReply, error)
+
+    }
+}
+
+"interfaces.PrincipalNetworkDomain" <|-- "nucleus.pndImplementation"
+
+namespace restconf {
+    class southboundInterface << (S,Aquamarine) >> {
+        - name string
+        - clientContainer []interfaces.Client
+
+        + AddClient() error
+        + RemoveClient() error
+        + CollectHeartbeats() error
+        + ListClients() <font color=blue>map</font>[int]interfaces.Client
+
+    }
+}
+
+"interfaces.SouthboundInterface" <|-- "restconf.southboundInterface"
+@enduml
+
+```
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